CN107174253B - Method, device and system for judging lower limb movement posture - Google Patents
Method, device and system for judging lower limb movement posture Download PDFInfo
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- CN107174253B CN107174253B CN201710367119.6A CN201710367119A CN107174253B CN 107174253 B CN107174253 B CN 107174253B CN 201710367119 A CN201710367119 A CN 201710367119A CN 107174253 B CN107174253 B CN 107174253B
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Abstract
The invention discloses a method, a device and a system for judging a lower limb movement posture, and relates to the field of intelligent wearable equipment. The judging method comprises the following steps: acquiring a plantar pressure value of a human body; dividing a gait cycle according to the change of the plantar pressure value, and calculating the motion parameters of the human body; and judging whether the motion posture of the human body is correct or not according to the motion parameters. The judging device is used for executing the judging method, and the judging system comprises the judging device and a wearing device. According to the invention, the motion parameters of the human body are calculated by acquiring the pressure value of the sole of the human body in the motion process of the user, and whether the motion posture of the human body is correct is judged according to the motion parameters, so that the user can be guided to exercise according to a correct motion method and motion posture, a better motion effect is achieved, and the limb is ensured not to be damaged.
Description
Technical Field
The invention relates to the field of intelligent wearable equipment, in particular to a method, a device and a system for judging a lower limb movement posture.
Background
Running exercise is more and more popular, but every person is different in the exercise method, and wrong running postures or methods are easy to cause accidents and chronic injuries of the body, so that it becomes important to guide and analyze problems in running of the person and provide an effective running suggestion.
The intelligent insole in the prior art is mainly used for accurately counting steps and analyzing foot stress so as to obtain accurate movement data and states of a user, but the user does not know whether the movement mode of the user is correct or not and whether limbs are damaged or not.
Disclosure of Invention
The invention aims to provide a method, a device and a system for judging the motion posture of lower limbs, which can judge whether the motion posture of a human body is correct or not by analyzing the pressure change of the soles of the human body.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a method for determining a lower limb movement posture, including:
acquiring a plantar pressure value of a human body;
dividing a gait cycle according to the change of the plantar pressure value, and calculating the motion parameters of the human body;
and judging whether the motion posture of the human body is correct or not according to the motion parameters.
Wherein, divide the gait cycle according to the change of the pressure value of the sole, and calculate the motion parameter of the human body, including:
selecting a pressure peak value, a pressure peak value time point and a zero pressure value time point in each gait cycle;
the zero pressure value time point comprises a first zero pressure value time point and a second zero pressure value time point;
the motion parameters comprise knee joint load rate and acceleration capacity;
the knee joint load rate is the ratio of the pressure peak value to the landing time, wherein the landing time is the time length from the first zero pressure value time point to the pressure peak value time point;
the acceleration capability is the ratio of the pressure peak value to the ground treading time, wherein the ground treading time is the time length from the pressure peak value time point to the second zero pressure value time point.
Further, the pressure peak value comprises a first pressure peak value and a second pressure peak value, which respectively correspond to a first pressure peak value time point and a second pressure peak value time point;
accordingly, the method can be used for solving the problems that,
the knee joint load rate is the ratio of a first pressure peak value to landing time, wherein the landing time is the time length from a first zero pressure value time point to a first pressure peak value time point;
the acceleration capacity is the ratio of the second pressure peak value to the ground treading time, wherein the ground treading time is the time length from the second pressure peak value time point to the second zero pressure value time point.
Correspondingly, judging whether the motion posture of the human body is correct according to the motion parameters comprises the following steps:
if the knee joint load rate is within the first threshold value range, determining that the landing posture of the human body is correct;
and if the acceleration capacity is within the second threshold value range, determining that the pedaling posture of the human body is correct.
Further, the method for dividing the gait cycle according to the change of the plantar pressure value and calculating the motion parameters of the human body further comprises the following steps:
acquiring the rising time length of which the sole pressure value is zero and the touchdown time length of which the sole pressure value is not zero in each gait cycle;
and calculating the ratio of the flight time length to the touchdown time length as a flight touchdown time ratio.
Correspondingly, judging whether the motion posture of the human body is correct according to the motion parameters comprises the following steps:
and judging whether the motion posture of the human body is correct or not according to the motion type, the flight-to-ground time ratio and a preset standard.
Further, calculating a ratio of the flight time length to the touchdown time length as a flight touchdown time ratio, further comprising:
respectively calculating the soakage time ratio of the left foot and the soakage time ratio of the right foot;
correspondingly, judging whether the motion posture of the human body is correct according to the motion parameters comprises the following steps:
and if the absolute value of the difference between the soakage time ratio of the left foot and the soakage time ratio of the right foot is greater than or equal to a third threshold value, determining that the left foot and the right foot of the human body are unbalanced in load.
In a second aspect, the present invention provides a device for determining a posture of a lower limb, comprising:
the acquisition module is used for acquiring a plantar pressure value of a human body;
the calculation module is used for dividing a gait cycle according to the change of the plantar pressure value and calculating the motion parameters of the human body;
and the judging module is used for judging whether the motion posture of the human body is correct or not according to the motion parameters.
In a third aspect, the present invention provides a system for determining a lower limb movement posture, including: a wearable device and a device for judging the motion posture of the lower limbs;
the wearable device is provided with at least one pressure sensor for sensing the pressure value of the sole of a human body and sending the sensed pressure value of the sole to the judging device.
Wherein, the wearing device is an intelligent insole.
The invention has the beneficial effects that:
the invention calculates the motion parameters of the human body by acquiring the pressure value of the sole of the human body in the motion process, judges whether the motion posture of the human body is correct or not according to the motion parameters, and can guide a user to exercise according to a correct motion method and motion posture so as to achieve better motion effect and ensure that the limb is not damaged.
Drawings
Fig. 1 is a flowchart of a method for determining a lower limb movement state according to a first embodiment and a second embodiment of the present invention;
fig. 2 is a schematic structural diagram of a system for determining a motion state of a lower limb according to a third embodiment of the present invention.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Example one
The embodiment provides a method for judging a lower limb movement posture, which is suitable for judging whether the posture of a lower limb part of a human body is correct or not in a movement process. The device is executed by a device for judging the motion posture of the lower limbs, comprises a wearing device and an intelligent terminal, and is realized by software and hardware.
As shown in fig. 1, the method for determining the lower limb movement posture comprises the following steps:
and S11, obtaining the pressure value of the sole of the human body.
In this embodiment, the wearing device is intelligent shoe-pad, gathers the sole pressure value of human motion in-process through the pressure sensor who sets up on intelligent shoe-pad. The pressure sensors are distributed at the positions of the big toe, the metatarsal bone, the heel and the like.
And S12, dividing the gait cycle according to the change of the plantar pressure value, and calculating the motion parameters of the human body.
For the sports such as walking, running, three-stage jumping, playing balls and the like, the pressure value of the sole collected by the pressure sensor can be changed continuously due to the change of the steps of a human body, the gait cycle is divided according to the changes, a complete gait cycle comprises a support phase and a swing phase, wherein the support phase sequentially comprises four stages of heel touchdown, forefoot touchdown, full-foot support and forefoot treading. A. A heel strike stage, wherein the heel touches the ground and the metatarsal begins to strike the ground, namely the pressure data of any one pressure sensor positioned at the heel is not zero and the pressure data of any one pressure sensor positioned at the metatarsal is not zero; B. in the forefoot touchdown stage, the metatarsal begins to touch down to the forefoot full touchdown, namely, the pressure data of any pressure sensor positioned on the metatarsal is not zero, and the pressure data of all the pressure sensors positioned on the big toe and the metatarsal is not zero; C. in the full-foot supporting stage, the forefoot completely touches the ground to the hindfoot leaves the ground, namely, the pressure data of all pressure sensors positioned on the big toe and the metatarsus are not zero, and the pressure data of any one pressure sensor positioned on the heel is zero; D. in the front foot pedaling stage, the heel leaves the ground to the whole foot leaves the ground, namely, the pressure data of any one pressure sensor positioned at the heel is zero to the pressure data of all the pressure sensors is zero; and the front foot enters a swing phase after the ground treading stage, and the pressure data of all the pressure sensors are zero.
Selecting a pressure peak value, a pressure peak value time point and a zero pressure value time point in each gait cycle; the zero pressure value time point includes a first zero pressure value time point and a second zero pressure value time point.
The motion parameters include knee joint load rate and acceleration capability.
The knee joint load rate is the pressure peak value/landing time, the landing time is the time length from the first zero pressure value time point to the pressure peak value time point, namely the time length from the previous foot pedaling stage in the previous gait cycle when the pressure is zero to the heel touchdown stage in the current gait cycle, and the pressure peak value occurs in the heel touchdown stage. The knee joint load factor is calculated according to the condition that the foot falls to the ground, and the first zero pressure value time point is the time point when all pressure sensor pressure data of the front foot pedaling stage in the previous gait cycle become zero.
Acceleration capacity is the pressure peak/kick-off time, which is the time period from the pressure peak time point to the second zero pressure value time point. The pressure peak value appears when the front foot pedals the ground, and the second zero pressure value time point is the time when all pressure sensor pressure data of the front foot pedaling stage in the gait cycle becomes zero.
The support phase of the partial jumping motion is only B phase and D phase, the forefoot rapidly kicks the ground after touching the ground, the pressure data appears on the pressure sensors of the big toe and the metatarsal, and at the moment, only one pressure peak value exists in one gait cycle.
Further, when the supporting phase of one gait cycle has a complete A-D stage, the pressure peak value comprises a first pressure peak value and a second pressure peak value which respectively correspond to a first pressure peak value time point and a second pressure peak value time point; a first pressure peak occurs during heel strike, which is labeled as a first pressure peak time point, and a second pressure peak occurs during forefoot strike, which is labeled as a second pressure peak time point.
Correspondingly, the knee joint load rate is equal to a first pressure peak value/landing time, and the landing time is the time length from the first zero pressure value time point to the first pressure peak value time point; the acceleration capacity is the second pressure peak/kick-off time, which is the time period from the second pressure peak time point to the second zero pressure value time point.
And S13, judging whether the motion posture of the human body is correct or not according to the motion parameters.
If the knee joint load rate is within the first threshold value range, determining that the landing posture of the human body is correct; if the knee joint load rate is larger than the first threshold range, determining that the landing posture of the human body is abnormal; at the moment, the cushioning of the knee joint is insufficient, the load is large, and the damage of the motion posture to the knee joint is also large; and if the knee joint load rate is smaller than the first threshold range, the landing posture of the human body is determined to be good, the buffering capacity is strong, and the knee joint load is small.
If the acceleration capability is within the second threshold value range, the correct pedaling posture of the human body is determined, and the acceleration capability is normal; if the acceleration capacity is larger than the second threshold range, the correct pedaling posture of the human body is determined, the acceleration capacity is good, the muscle strength of the lower limbs is good, the contraction speed is high, and the action is light and elastic; and if the acceleration capacity is smaller than the second threshold range, determining that the stepping posture of the human body is abnormal and the acceleration capacity is poor.
The first threshold range and the second threshold range are set according to actual conditions, different sports items and sports fields and can be obtained according to analysis of a large amount of measured data.
In addition, the knee joint load rate and the acceleration capability of the left foot and the right foot can be further analyzed, and when the difference between the left foot and the right foot is large, the left foot and the right foot are unbalanced in stress or force application.
Further, before step S11, the method further includes:
and judging whether the human body enters a motion state, if so, executing step S11.
The wearing device is provided with the accelerometer, when the value of the accelerometer accords with a certain preset rule, the human body can be judged to carry out certain movement, the human body is determined to enter a movement state, and the wearing device automatically enters a collection state of a plantar pressure value at the moment.
In the embodiment, the motion parameters of the human body are calculated by acquiring the pressure value of the sole of the human body in the motion process, and whether the motion posture of the human body is correct is judged according to the motion parameters, so that a user can be guided to exercise according to a correct motion method and motion posture, a better motion effect is achieved, the limb is prevented from being damaged, and the device has a wide application scene in actual life.
Example two
The present embodiment provides a method for determining a lower limb movement posture, which is performed while the determination of the first embodiment is implemented.
As shown in fig. 1, the method for determining the lower limb movement posture comprises the following steps:
and S11, obtaining the pressure value of the sole of the human body.
And S12, dividing the gait cycle according to the change of the plantar pressure value, and calculating the motion parameters of the human body.
Acquiring the rising time length of which the sole pressure value is zero and the touchdown time length of which the sole pressure value is not zero, namely the time length of a swing phase and the time length of a support phase in each gait cycle; and calculating the ratio of the flight time length to the touchdown time length as a flight touchdown time ratio.
Further, for an exercise (such as running) in which the left and right feet are not synchronized, the flight contact time ratio of the left foot and the flight contact time ratio of the right foot are calculated, respectively.
And S13, judging whether the motion posture of the human body is correct or not according to the motion parameters.
And judging whether the motion posture of the human body is correct or not according to the motion type, the flight-to-ground time ratio and a preset standard. The preset standard is related to the type of exercise, and the judgment standard is different for different types of exercise. For example, for a bouncing type sport, the larger the soaring ground contact time ratio is, the better the bouncing capability is, and the higher the jumping is or the farther the jumping is; for sports such as running, if the absolute value of the difference between the flight contact time ratio of the left foot and the flight contact time ratio of the right foot is equal to or greater than a third threshold value, it is determined that the left and right foot loads of the human body are unbalanced.
In the embodiment, the motion parameters of the human body are calculated by acquiring the pressure value of the sole of the human body in the motion process, and whether the motion posture of the human body is correct is judged according to the motion parameters, so that a user can be guided to exercise according to a correct motion method and motion posture, a better motion effect is achieved, the limb is prevented from being damaged, and the device has a wide application scene in actual life.
EXAMPLE III
The present embodiment provides a device for determining a lower limb movement posture, which is used for executing the determination method described in the foregoing embodiments, so as to solve the same technical problems and achieve the same technical effects.
As shown in fig. 2, the lower limb movement posture determination device 32 includes: an obtaining module 320, a calculating module 321 and a judging module 322.
The obtaining module 320 is configured to obtain a plantar pressure value of a human body.
And the calculating module 321 is configured to divide a gait cycle according to the change of the plantar pressure value, and calculate a motion parameter of the human body.
The judging module 322 is configured to judge whether the motion posture of the human body is correct according to the motion parameter.
This embodiment still provides a judgement system of low limbs motion gesture, includes: a wearing device 31 and the above-mentioned judging device 32; the wearing device 31 is provided with at least one pressure sensor 310, and the pressure sensors 310 are distributed at positions of the big toe, the metatarsal bones, the heel and the like, and are used for sensing the pressure value of the sole of a human body and sending the sensed pressure value of the sole to the judging device 32.
The wearable device 31 and the determination device 32 respectively include transmission modules, and the determination device 32 is connected to the wearable device 31 through the transmission modules, and is configured to receive the plantar pressure value acquired by the acquisition module 320, where the connection may be a wired connection or a wireless connection.
The wearable device 31 may further include a storage module for storing the collected plantar pressure value.
The wearing device 31 is an intelligent insole. The judging device 32 can be integrated with the wearing device 31 and arranged in the intelligent insole, a user can check the judging result on the display device and can also be independently arranged in the intelligent terminal, the user can synchronize data on the judging device 32 after finishing exercise, the judging device 32 does not need to be carried in the exercise process, the wearing device 31 does not need to be constantly connected with the judging device 32, and energy consumption is saved. The intelligent terminal comprises intelligent processing equipment such as a mobile phone and a computer and is used for executing the operation of the corresponding software part.
The judging device provided by the embodiment can acquire pressure data in real time by only arranging the wearing device on the sole for movement, and provides the pressure data for the judging device to judge the movement posture so as to assist the movement of a user and achieve the double effects of recording and guiding.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (9)
1. A method for judging the motion posture of lower limbs is characterized in that:
acquiring a plantar pressure value of a human body;
dividing a gait cycle according to the change of the plantar pressure value, and calculating the motion parameters of the human body, wherein the steps comprise:
selecting a pressure peak value, a pressure peak value time point and a zero pressure value time point in each gait cycle;
the zero pressure value time point comprises a first zero pressure value time point and a second zero pressure value time point;
the motion parameters comprise knee joint load rate and acceleration capacity;
the knee joint load rate is the ratio of the pressure peak value to the landing time, wherein the landing time is the time length from the first zero pressure value time point to the pressure peak value time point;
the acceleration capacity is the ratio of the pressure peak value to the ground treading time, wherein the ground treading time is the time length from the pressure peak value time point to the second zero pressure value time point;
and judging whether the motion posture of the human body is correct or not according to the motion parameters.
2. The judgment method according to claim 1, wherein:
the pressure peak value comprises a first pressure peak value and a second pressure peak value which respectively correspond to a first pressure peak value time point and a second pressure peak value time point;
accordingly, the method can be used for solving the problems that,
the knee joint load rate is the ratio of a first pressure peak value to landing time, wherein the landing time is the time length from a first zero pressure value time point to a first pressure peak value time point;
the acceleration capacity is the ratio of the second pressure peak value to the ground treading time, wherein the ground treading time is the time length from the second pressure peak value time point to the second zero pressure value time point.
3. The method according to claim 1 or 2, wherein determining whether the motion posture of the human body is correct according to the motion parameters comprises:
if the knee joint load rate is within the first threshold value range, determining that the landing posture of the human body is correct;
and if the acceleration capacity is within the second threshold value range, determining that the pedaling posture of the human body is correct.
4. The method according to claim 1, wherein the step of dividing a gait cycle according to the change in the plantar pressure value and calculating a motion parameter of the human body further comprises:
acquiring the rising time length of which the sole pressure value is zero and the touchdown time length of which the sole pressure value is not zero in each gait cycle;
and calculating the ratio of the flight time length to the touchdown time length as a flight touchdown time ratio.
5. The method according to claim 4, wherein determining whether the motion posture of the human body is correct according to the motion parameters comprises:
and judging whether the motion posture of the human body is correct or not according to the motion type, the flight-to-ground time ratio and a preset standard.
6. The method of claim 4, wherein calculating a ratio of a flight duration to a touchdown duration as a flight touchdown time ratio further comprises:
respectively calculating the soakage time ratio of the left foot and the soakage time ratio of the right foot;
correspondingly, judging whether the motion posture of the human body is correct according to the motion parameters comprises the following steps:
and if the absolute value of the difference between the soakage time ratio of the left foot and the soakage time ratio of the right foot is greater than or equal to a third threshold value, determining that the left foot and the right foot of the human body are unbalanced in load.
7. A device for judging a lower limb movement posture, comprising:
the acquisition module is used for acquiring a plantar pressure value of a human body;
the calculation module is used for dividing the gait cycle according to the change of the plantar pressure value and calculating the motion parameters of the human body, and comprises the following steps:
selecting a pressure peak value, a pressure peak value time point and a zero pressure value time point in each gait cycle;
the zero pressure value time point comprises a first zero pressure value time point and a second zero pressure value time point;
the motion parameters comprise knee joint load rate and acceleration capacity;
the knee joint load rate is the ratio of the pressure peak value to the landing time, wherein the landing time is the time length from the first zero pressure value time point to the pressure peak value time point;
the acceleration capacity is the ratio of the pressure peak value to the ground treading time, wherein the ground treading time is the time length from the pressure peak value time point to the second zero pressure value time point;
and the judging module is used for judging whether the motion posture of the human body is correct or not according to the motion parameters.
8. A system for judging a lower limb movement posture, comprising: a wearing device and a lower limb movement posture judgment device according to claim 7;
the wearable device is provided with at least one pressure sensor for sensing the pressure value of the sole of a human body and sending the sensed pressure value of the sole to the judging device.
9. The judgment system according to claim 8, wherein:
the wearing device is an intelligent insole.
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| CN101627900A (en) * | 2009-08-10 | 2010-01-20 | 北京大学第三医院 | Method for auxiliary evaluation of stress states of knee joints |
| CN102670217A (en) * | 2012-05-04 | 2012-09-19 | 嘉兴市制衡精仪有限公司 | Wearable sensor measuring device and method for lower limb joint acting force and moment |
| KR20150010912A (en) * | 2013-07-21 | 2015-01-29 | 김지욱 | Appapatus for curing body status |
| CN106621250A (en) * | 2016-10-28 | 2017-05-10 | 上海与德信息技术有限公司 | Sports state analysis method and system |
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| CN107174253A (en) | 2017-09-19 |
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